I love my Hotshot. The charge lasts longer than I thought it would. And it's super bright. Perfect even for day rides.
I also have a Cygolite Expilion, not the same as the Metro, but it's a great light. I've been commuting with it for a couple of years now. Middle brightness is fine, and battery life gets me through a couple of commutes. I bought a spare battery, which I think was a good investment. I've dropped it more than once and it didn't break.